Added the docs for what hadoopDist values can be
Added the docs for what hadoopDist values can be

radiantbluetechnologies/ossim-geotools,radiantbluetechnologies/ossim-geotools,radiantbluetechnologies/ossim-geotools,radiantbluetechnologies/ossim-geotools,radiantbluetechnologies/ossim-geotools